Ke-yi SHI, Chun-jian DENG, Kun ZOU. Point pick-up in three-dimension model based on OpenGL[J]. Chinese journal of liquid crystals and displays, 2016, 31(7): 708-713.
DOI:
Ke-yi SHI, Chun-jian DENG, Kun ZOU. Point pick-up in three-dimension model based on OpenGL[J]. Chinese journal of liquid crystals and displays, 2016, 31(7): 708-713. DOI: 10.3788/YJYXS20163107.0708.
Point pick-up in three-dimension model based on OpenGL
To pick-up a specified coordinate of a point is a basic operation for a 3D model file. Aimed at the shortages of traditional methods about 3D picking
a new method
which points at getting the original coordinate of specified point
is proposed.During picking
rotation at any angle is allowed. So points either on the side or on the back can be selected.And rotation matrix is used to restore points to their original state.The method transform the two-dimensional pixel coordinate to 3D model coordinate then to original model coordinate. All the points on visible surface can be picked precisely by this method and thus the flexibility is improved.
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